【摘要】 稀土元素在镁合金中能够细化晶粒尺寸,可以利用其固溶强化和第二相强化机制提高合金力学性能,改善镁合金的抗高温蠕变能力。介绍了镁合金的蠕变机理,以及稀土Y元素、Gd元素、Sc元素和Ce元素对镁合金组织和蠕变性能的影响,综述了目前国内外开发的Mg-Y、Mg-Gd、Mg-Sc、Mg-Ce等一系列稀土镁合金的研发现状,对稀土镁合金的发展现状给予意见,并对稀土镁合金的发展前景进行展望。更多还原

【Abstract】 Rare earths element can refine the grain size,take advantage of the solid solution strengthening and the second phase strengthening to improve the properties of the mechanical alloy and the ability of high temperature creep resistance of magnesium alloy.The creep mechanism of magnesium alloy is described.The effect of rare earth elements Y,Gd,Sc and Ce on magnesium alloy structure and creep properties is introduced.Research and development situation of Mg-Y,Mg-Gd,Mg-Sc,Mg-Ce,and a series of rare earth magnesium alloys at home and abroad are reviewed.Some advice to the development of rare earth magnesium alloys is given and development prospects are forecast.更多还原